Japanese tech giant Advantest hit by ransomware attack

Bleeping Computer

by Bill Toulas

February 20, 2026

AI-Generated Deep Dive Summary

Japanese tech giant Advantest, a leading provider of semiconductor testing equipment and other advanced technologies, has fallen victim to a ransomware attack. The company revealed that its corporate network was targeted on February 15, with preliminary findings indicating unauthorized access to parts of its system. While no data theft has been confirmed yet, the incident highlights the growing threat of cyberattacks on large corporations, particularly in Japan, where several high-profile companies have recently faced similar issues. Advantest, which employs over 7,600 people and generates annual revenue exceeding $5 billion, promptly responded to the breach by isolating affected systems and engaging third-party cybersecurity experts. The company emphasized that its investigation is ongoing, with no ransomware group claiming responsibility for the attack at the time of reporting. If customer or employee data was compromised, Advantest has pledged to notify those affected directly and provide guidance on mitigating risks. The attack underscores the vulnerabilities in modern IT infrastructure and the need for robust cybersecurity measures. As cybercriminals increasingly target large corporations, businesses must remain vigilant and prepared to respond swiftly to such incidents. This case also highlights the importance of proactive security strategies, including regular system updates, employee training, and collaboration with specialized cybersecurity teams. The incident aligns with a recent surge in cyberattacks on Japanese companies, including notable breaches at Nissan, Muji, and NTT. These examples demonstrate that no industry is immune to such threats, making it essential for organizations to prioritize security to protect their operations and sensitive data.

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Originally published on Bleeping Computer on 2/20/2026